Motor assembly and electric toothbrush

Abstract

The present invention discloses a motor assembly and an electric toothbrush, relating to the technical field of motor installation. The motor assembly includes a mounting bracket and a driving mechanism. The driving mechanism includes a rotor, stator teeth and a stator coil. The mounting bracket is used to be connected inside the brush handle of the electric toothbrush. The mounting bracket includes a mounting cover body and a mounting main body. The mounting main body is provided with a first accommodating space and a first mounting opening that communicate with each other. The mounting cover body covers the first mounting opening and jointly clamps the rotor in the first accommodating space with the mounting main body. The rotor can rotate relative to the mounting main body and is used for driving connection with the brush head of the electric toothbrush. The stator coil is wound around the outer side surface of the mounting main body. The stator teeth are connected to the mounting main body, penetrate through the stator coil and correspond to the rotor. The motor assembly and the electric toothbrush have the characteristic of a relatively small overall volume.

Description

Technical Field

[0001] The present invention relates to the technical field of motor installation, and more specifically, to a motor assembly and an electric toothbrush. Background Art

[0002] With the improvement of people's living standards, more and more attention is paid to oral health care, and electric toothbrushes are increasingly entering family life.

[0003] Currently, an electric toothbrush drives the brush head through a motor. The existing motor structure is that after the motor is assembled, it is directly installed in a bracket, and then the motor is wrapped by the bracket and then installed in the outer shell of the toothbrush handle. This makes the overall volume of the electric toothbrush relatively large.

[0004] In view of this, it is particularly important to develop and design a motor assembly and an electric toothbrush that can solve the above technical problems. Summary of the Invention

[0005] The purpose of the present invention is to provide a motor assembly, which has the characteristic of a relatively small overall volume.

[0006] Another purpose of the present invention is to provide an electric toothbrush, which has the characteristic of a relatively small overall volume.

[0007] The present invention provides a technical solution:

[0008] In a first aspect, an embodiment of the present invention provides a motor assembly, including a mounting bracket and a driving mechanism. The driving mechanism includes a rotor, stator teeth, and a stator coil. The mounting bracket is used to be connected inside the toothbrush handle of the electric toothbrush. The mounting bracket includes a mounting cover and a mounting body. The mounting body is provided with a first accommodating space and a first mounting opening that communicate with each other. The mounting cover covers the first mounting opening and jointly clamps the rotor in the first accommodating space with the mounting body. The rotor can rotate relative to the mounting body and is used for driving connection with the brush head of the electric toothbrush. The stator coil is wound around the outer side surface of the mounting body. The stator teeth are connected to the mounting body, penetrate through the stator coil, and correspond to the rotor.

[0009] Combined with the first aspect, in the first implementation manner of the first aspect, the mounting body is strip-shaped, and the first mounting opening is located on the side surface of the mounting body and can allow the rotor to pass through, so that the rotor can be inserted into the first accommodating space from the first mounting opening.

[0010] Combined with the first aspect and its above implementation manners, in the second implementation manner of the first aspect, one end of the mounting cover body is a clamping end, the clamping end is clamped with the edge of the first mounting opening, and the other end is detachably connected to the edge of the first mounting opening, so as to detachably cover the first mounting opening.

[0011] Combined with the first aspect and its above implementation manners, in the third implementation manner of the first aspect, the clamping end is used to clamp the rotor together with the mounting body. The end face of the clamping end is a clamping end face, a first clamping protrusion protrudes from the clamping end face, and a first clamping portion protrudes from the first clamping protrusion; a clamping notch communicating with the first accommodating space is formed in the edge of the first mounting opening. The first clamping protrusion is located in the clamping notch, and the first clamping portion is located in the first accommodating space and abuts against the wall surface of the first accommodating space, so as to detachably clamp the clamping end to the mounting body.

[0012] Combined with the first aspect and its above implementation manners, in the fourth implementation manner of the first aspect, the end face of the clamping end is a clamping end face, and a clamping interval is left between the first clamping portion and the clamping end face; a first clamping convex block protrudes from the wall surface of the first accommodating space. The first clamping convex block is located in the clamping interval and abuts against the first clamping portion and / or the clamping end face respectively.

[0013] Combined with the first aspect and its above implementation manners, in the fifth implementation manner of the first aspect, a stator connection portion protrudes from the outer side surface of the mounting body. A fixing hole is formed at one end of the stator connection portion away from the mounting body, and the fixing hole communicates with the first accommodating space; the stator coil is wound around the stator connection portion, and the stator tooth penetrates through the fixing hole.

[0014] Combined with the first aspect and its above implementation manners, in the sixth implementation manner of the first aspect, the number of the stator teeth, the stator coils and the stator connection portions is two. The two stator connection portions are symmetrically arranged on the outer side surface of the mounting body; the stator tooth includes a tooth portion and a yoke portion. The yoke portion is arranged in a U shape. The tooth portion penetrates through the fixing hole and is connected to the middle of the yoke portion. The two end portions of the yoke portion on one side of the mounting body are respectively connected to the two end portions of the yoke portion on the other side of the mounting body.

[0015] Combined with the first aspect and its above implementation manners, in the seventh implementation manner of the first aspect, one end of the installation main body is an output end, an output opening is formed in the output end, the installation bracket further includes a sealing member, the sealing member is sleeved on the output end and is clamped to the output end; a part of the rotor can extend out of the first accommodation space through the output opening and pass through the sealing member to be connected to the brush head.

[0016] Combined with the first aspect and its above implementation manners, in the eighth implementation manner of the first aspect, the motor assembly further includes a power source, the power source is electrically connected to the stator coil; a second accommodation space and a second installation opening that communicate with each other are further formed in the installation main body, the second installation opening is located on the side surface of the installation main body and can allow the power source to pass through, and the second accommodation space is used for accommodating the power source.

[0017] In a second aspect, an embodiment of the present invention further provides an electric toothbrush, including a brush head, a brush handle and the motor assembly; the motor assembly includes an installation bracket and a driving mechanism, the driving mechanism includes a rotor, stator teeth and a stator coil; the installation bracket is used to be connected inside the brush handle of the electric toothbrush, the installation bracket includes an installation cover body and an installation main body, the installation main body is provided with a first accommodation space and a first installation opening that communicate with each other, the installation cover body covers the first installation opening and jointly clamps the rotor in the first accommodation space with the installation main body, the rotor can rotate relative to the installation main body and is used for drivingly connecting with the brush head of the electric toothbrush; the stator coil is wound around the outer side surface of the installation main body, the stator teeth are connected to the installation main body, pass through the stator coil and correspond to the rotor.

[0018] Compared with the prior art, the beneficial effects of the motor assembly and the electric toothbrush provided by the embodiments of the present invention compared with the prior art include:

[0019] The driving mechanism includes a rotor, stator teeth and a stator coil, and the mounting bracket is used to be connected to the handle of the electric toothbrush, wherein the mounting bracket includes a mounting cover and a mounting body, a first accommodating space and a first mounting opening are provided on the mounting body, and the first accommodating space and the first mounting opening are communicated, and the mounting cover is covered on the first mounting opening, and clamps the rotor in the first accommodating space together with the mounting body, and the rotor can rotate relative to the mounting body, and the rotor is used to be connected to the brush head of the electric toothbrush. The stator coil is wound around the outer side of the mounting body, the stator teeth are connected to the mounting body, and are penetrated by the stator coil, and correspond to the rotor, so as to drive the rotor to swing. In this way, the mounting body is designed in this way, and the rotor, stator teeth and stator coil can be directly installed, so as to save the bracket for separately installing the rotor, stator coil and stator teeth, reduce the volume of the motor assembly, and facilitate the user to hold it, and the installation method of clamping the rotor together by the mounting cover and the mounting body makes the assembly of the rotor more flexible and convenient. In addition, the structure of the motor is simplified, which can reduce noise.

[0020] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only illustrate certain embodiments of the present invention and should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can also be obtained based on these drawings without creative work.

[0022] Figure 1 A schematic structural diagram of a motor assembly provided in an embodiment of the present invention applied to an electric toothbrush.

[0023] Figure 2 A schematic diagram of the three-dimensional structure of the motor assembly provided in an embodiment of the present invention during assembly.

[0024] Figure 3 A schematic diagram of the exploded structure of a motor assembly provided in an embodiment of the present invention.

[0025] Figure 4 A schematic diagram of the three-dimensional structure of a mounting cover of a motor assembly provided in an embodiment of the present invention.

[0026] Figure 5 for Figure 3 Enlarged schematic diagram of the local structure at V in the middle.

[0027] Figure 6 for Figure 3 A magnified schematic diagram of the local structure at point VI.

[0028] Figure 7 Explosion schematic diagram of the installation main body, installation cover body and rotor of another structural form of the motor assembly provided by the embodiment of the present invention.

[0029] Figure 8 Explosion schematic diagram of the motor assembly provided by the embodiment of the present invention when only the stator teeth are separated.

[0030] Figure 9 Schematic diagram of the structure of the motor assembly provided by the embodiment of the present invention during assembly.

[0031] Figure 10 For Figure 9 Schematic diagram of the sectional structure at A-A in

[0032] Icon: 100 - electric toothbrush; 20 - brush head; 30 - brush handle; 10 - motor assembly; 12 - mounting bracket; 121 - mounting cover body; 1211 - second clamping groove; 1212 - clamping end; 1213 - clamping end face; 1214 - first clamping protrusion; 1215 - first clamping part; 1216 - guiding inclined surface; 1217 - clamping interval; 1218 - second clamping protrusion; 123 - installation main body; 1231 - first accommodation space; 12312 - first installation opening; 12313 - clamping notch; 12314 - clamping opening; 12315 - output opening; 12317 - output end; 12316 - connecting through hole; 1232 - second accommodation space; 12321 - second installation opening; 12322 - clamping elastic piece; 1235 - first clamping protrusion block; 1236 - second clamping protrusion block; 1237 - stator connection part; 12371 - fixing hole; 1239 - stator fixing part; 1238 - clamping block; 125 - seal; 1251 - sealing part; 1252 - clamping interface; 1253 - sealing connection part; 13 - driving mechanism; 131 - rotor; 1312 - rotating shaft; 1313 - iron core; 1314 - magnet; 1315 - bearing; 1316 - elastic piece; 132 - stator teeth; 1321 - tooth part; 1322 - yoke part; 133 - stator coil; 15 - power supply. Detailed implementation manners

[0033] In order to make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. Usually, the components of the embodiments of the present invention described and illustrated in the accompanying drawings here can be arranged and designed in various different configurations.

[0034] It should be noted that similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings. The orientation or positional relationship indicated by the terms "upper", "lower", "inner", "outer", "left", "right", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the inventive product is customarily placed during use, or the orientation or positional relationship commonly understood by those skilled in the art. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation on the present invention. The terms "first", "second", etc. are only used for distinguishing descriptions and should not be construed as indicating or implying relative importance. The term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, such that a process, method, article or device comprising a series of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising an..." does not exclude the presence of additional identical elements in the process, method, article or device comprising the element.

[0035] It should also be noted that unless otherwise clearly specified and defined, terms such as "arranged" and "connected" should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0036] The following will describe in detail the specific embodiments of the present invention with reference to the drawings.

[0037] Embodiment:

[0038] Please refer to Figure 1 , Figure 1 , which is a schematic structural diagram of the motor assembly 10 provided by the embodiment of the present invention applied to the electric toothbrush 100.

[0039] The embodiment of the present invention provides a motor assembly 10, which has the characteristic of a relatively small overall volume. The motor assembly 10 can be applied to scenarios that require vibration, such as electric toothbrushes 100, hair removal devices, beauty devices, skin rejuvenation devices, and dental irrigators. Of course, the motor assembly 10 can also be used independently.

[0040] Among them, taking the application of the motor assembly 10 to the electric toothbrush 100 as an example, the electric toothbrush 100 includes the above-mentioned motor assembly 10 to provide a vibration power source. Of course, the electric toothbrush 100 can also include a brush head 20 and a brush handle 30. The motor assembly 10 can be installed in the brush handle 30 and is connected to the brush head 20 to drive the brush head 20 to vibrate, thereby completing the brushing action.

[0041] Since the electric toothbrush 100 adopts the motor assembly 10 provided in the embodiment of the present invention, the electric toothbrush 100 also has the characteristic of being relatively small in overall volume.

[0042] The structural composition, working principle and beneficial effects of the motor assembly 10 provided in an embodiment of the present invention will be specifically introduced below.

[0043] See also Figure 2 and Figure 3 , Figure 2 It is a schematic diagram of the three-dimensional structure of the motor assembly 10 provided in an embodiment of the present invention when assembled. Figure 3 A schematic diagram of the exploded structure of the motor assembly 10 provided in an embodiment of the present invention.

[0044] The motor assembly 10 includes a mounting bracket 12 and a driving mechanism 13, the driving mechanism 13 includes a rotor 131, stator teeth 132 and a stator coil 133, and the mounting bracket 12 is used to be connected to the brush handle 30 of the electric toothbrush 100, wherein the mounting bracket 12 includes a mounting cover 121 and a mounting body 123, a first accommodating space 1231 and a first mounting opening 12312 are provided on the mounting body 123, and the first accommodating space 1231 and the first mounting opening 12312 are communicated, and the mounting cover 121 covers the first mounting opening 12312 and clamps the rotor 131 in the first accommodating space 1231 together with the mounting body 123, and the rotor 131 can rotate relative to the mounting body 123, and the rotor 131 is used for transmission connection with the brush head 20 of the electric toothbrush 100. The stator coil 133 is wound around the outer side of the mounting body 123 , and the stator teeth 132 are connected to the mounting body 123 and penetrate the stator coil 133 , and correspond to the rotor 131 , so as to drive the rotor 131 to swing.

[0045] In this way, the mounting body 123 is designed in such a way that the rotor 131, the stator teeth 132 and the stator coil 133 can be directly mounted, so as to save the bracket for separately mounting the rotor 131, the stator coil 133 and the stator teeth 132, and reduce the volume of the motor assembly 10, so as to facilitate the user to hold it, and the mounting method of the rotor 131 being clamped by the mounting cover 121 and the mounting body 123 together makes the assembly of the rotor 131 more flexible and convenient. In addition, the structure of the motor is simplified, which can reduce noise.

[0046] It should be noted that, compared with the existing structure, the motor part composed of the rotor 131, the stator coil 133 and the stator teeth 132 assembled by the above installation structure can also have a larger diameter under the condition of the same installation space size, so as to increase the torque of the electric toothbrush 100 or reduce the power consumption of the electric toothbrush 100.

[0047] Furthermore, the installation main body 123 is arranged in a strip shape, and the first installation opening 12312 is located on the side of the installation main body 123, and the first installation opening 12312 can allow the rotor 131 to pass through, so that the rotor 131 can be inserted into the first accommodation space 1231 from the first installation opening 12312. In this way, during assembly, the rotor 131 can be first arranged in the first accommodation space 1231 through the first installation opening 12312, and then the installation cover body 121 is connected to the first installation opening 12312 to complete the assembly of the rotor 131. The assembly method of assembling the rotor 131 on the side of the installation main body 123 is simple and the assembly efficiency is relatively high.

[0048] It should be noted that the rotor 131 may include a rotating shaft 1312, an iron core 1313, a magnet 1314, a bearing 1315 and a spring piece 1316. The magnet 1314 is installed on the iron core 1313, the iron core 1313 is installed on the rotating shaft 1312, and the bearing 1315 is sleeved on the rotating shaft 1312. Among them, the iron core 1313 can be a ferromagnetic material, such as iron, nickel-cobalt and their alloys, etc. The installation cover body 121 and the installation main body 123 jointly clamp the rotating shaft 1312 to connect the rotor 131 with the first accommodation space 1231, and enable the rotating shaft 1312, the iron core 1313 and the magnet 1314 to rotate relative to the installation main body 123. One end of the rotating shaft 1312 extends out of the first accommodation space 1231 from the output opening 12315 on the installation main body 123, and the other end is connected to the spring piece 1316. The end of the spring piece 1316 far from the rotating shaft 1312 can be clamped between the installation main body 123 and the installation cover body 121.

[0049] In this way, during assembly, the rotating shaft 1312 can be first extended into the first accommodation space 1231, and then the rotating shaft 1312 is passed out from the output opening 12315, so that a part of the rotating shaft 1312 extends out of the first accommodation space 1231, and the end of the spring piece 1316 far from the rotating shaft 1312 is clamped on the installation main body 123. Then the installation cover body 121 is covered on the first installation opening 12312, so that the installation cover body 121 and the installation main body 123 jointly clamp the bearing 1315, and the installation cover body 121 and the installation main body 123 jointly clamp the spring piece 1316 to complete the assembly of the rotor 131. Before or after this, the stator coil 133 and the stator teeth 132 can be assembled on the installation main body 123.

[0050] Please continue to refer to Figure 2 and Figure 3, the motor assembly 10 may further include a power source 15. The power source 15 is electrically connected to the stator coil 133. A second accommodation space 1232 and a second installation opening 12321 that communicate with each other may be formed on the installation main body 123. The second installation opening 12321 is also located on the side surface of the installation main body 123, and the power source 15 can pass through the second installation opening 12321. The second accommodation space 1232 is used to accommodate the power source 15. When assembling the installation bracket 12 into the brush handle 30, the power source 15 can be first inserted into the second accommodation space 1232 through the second installation opening 12321, and then the installation bracket 12 can be inserted into the brush handle 30, making the installation of the power source 15 more convenient.

[0051] Further, a plurality of clamping elastic pieces 12322 may be provided on the installation main body 123. The plurality of clamping elastic pieces 12322 are respectively arranged on the edge of the second installation opening 12321, and the plurality of clamping elastic pieces 12322 are used to jointly clamp the power source 15. When the power source 15 is inserted into the second accommodation space 1232, the power source 15 squeezes open the plurality of clamping elastic pieces 12322. After the power source 15 is inserted into the second accommodation space 1232, the plurality of clamping elastic pieces 12322 press against the outer side surface of the power source 15, so that the power source 15 is fixed in the second accommodation space 1232.

[0052] Please refer to Figure 3 and Figure 4 , Figure 4 which is a schematic perspective view of the installation cover body 121 of the motor assembly 10 provided by the embodiment of the present invention.

[0053] A first clamping groove (not shown in the figure) may be provided on the installation main body 123. One end of the elastic piece 1316 away from the rotating shaft 1312 is partially clamped in the first clamping groove, and a second clamping groove 1211 opposite to the first clamping groove may be formed at one end of the installation cover body 121. When the installation cover body 121 is covered on the first installation opening 12312, the other part of the end of the elastic piece 1316 away from the rotating shaft 1312 can also be clamped in the second clamping groove 1211.

[0054] It should be noted that the second clamping groove 1211 may be a groove whose caliber gradually expands along its opening direction, or in other words, the opening part of the second clamping groove 1211 is in a wide-mouth setting, so that when the installation cover body 121 is covered on the first installation opening 12312, the elastic piece 1316 can be more easily clamped in the second clamping groove 1211.

[0055] Please refer to Figure 2 , Figure 5 and Figure 6 , Figure 5 which is Figure 3 a schematic enlarged view of the partial structure at V in Figure 6 which is Figure 3 a schematic enlarged view of the partial structure at VI in

[0056] The manner in which the mounting cover 121 covers the first mounting opening 12312 can be as follows: One end of the mounting cover 121 is snap-connected to the edge of the first mounting opening 12312, and the other end of the mounting cover 121 is detachably connected to the edge of the first mounting opening 12312, so as to detachably cover the first mounting opening 12312. During assembly, one end of the mounting cover 121 can be first snap-connected to the edge of the first mounting opening 12312, and then the other end is connected to the edge of the first mounting opening 12312. Its assembly method is relatively simple and the assembly is relatively fast.

[0057] Further, one end of the mounting cover 121 is a clamping end 1212, and this clamping end 1212 is the end that jointly clamps the rotor 131 with the mounting body 123. Taking the end face of the clamping end 1212 as the clamping end face 1213, a first snap projection 1214 can be convexly provided on the clamping end face 1213, and a first snap portion 1215 can be convexly provided on the first snap projection 1214.

[0058] Correspondingly, a snap notch 12313 communicating with the first accommodation space 1231 can be opened on the edge of the first mounting opening 12312. After the clamping end 1212 is snap-connected to the snap notch 12313, the first snap projection 1214 is located within the snap notch 12313, and the first snap portion 1215 abuts against the inner wall of the first accommodation space 1231. In other words, the snap notch 12313 can allow the first snap projection 1214 and the first snap portion 1215 to pass through. When connecting the clamping end 1212 and the mounting body 123, the first snap projection 1214 and the first snap portion 1215 can first be inserted into the first accommodation space 1231 through the snap notch 12313. Then, the mounting cover 121 is flipped so that the first snap portion 1215 abuts against the wall surface of the first accommodation space 1231, and at the same time, the clamping end 1212 and the mounting body 123 jointly clamp the bearing 1315, thereby locking the position of the clamping end 1212 and ensuring that the clamping end 1212 and the mounting body 123 stably clamp the bearing 1315.

[0059] It should be noted that the number of the first snap portions 1215 can be two, and they are symmetrically arranged on the first snap projection 1214. The first snap projection 1214 abuts against the inner wall of the first accommodation space 1231 through the two first snap portions 1215 together, so as to improve the stability of the clamping of the bearing 1315 by the clamping end 1212 and the mounting body 123.

[0060] Furthermore, a clamping interval 1217 may be left between the first clamping portion 1215 and the clamping end face 1213. Correspondingly, a first clamping protrusion 1235 is convexly provided on the wall surface of the first accommodation space 1231. And when the clamping end 1212 is clamped in the clamping notch 12313, the first clamping protrusion 1235 is located within the clamping interval 1217, and the first clamping protrusion 1235 abuts against the first clamping portion 1215 or the clamping end face 1213 respectively to limit the displacement of the clamping end 1212 on the clamping end face 1213, further improving the stability of clamping the bearing 1315 by the clamping end 1212 and the mounting body 123. It should be noted that in other embodiments, the first clamping protrusion 1235 may also only abut against the first clamping portion 1215 or the clamping end face 1213.

[0061] It should be noted that one end of the installation body can be detachably connected to the mounting body 123 through a screw.

[0062] Furthermore, the length of the clamping notch 12313 may be greater than the length of the first clamping protrusion 1214. And a second clamping protrusion 1236 is also convexly provided on the wall surface of the first accommodation space 1231. The second clamping protrusion 1236 is arranged close to the edge of the clamping notch 12313, and the second clamping protrusion 1236 is arranged at one end of the clamping notch 12313 close to the first installation opening 12312. When clamping the clamping end 1212 and the mounting body 123, the first clamping portion 1215 can extend into the first accommodation space 1231 from one end of the clamping notch 12313 far from the first installation opening 12312. As the first clamping protrusion 1214 moves along the edge of the clamping notch 12313 towards the first installation opening 12312, the first clamping portion 1215 abuts against the second clamping protrusion 1236 on the side close to the rotor 131. That is to say, the first clamping portion 1215 does not abut against the inner wall of the first accommodation space 1231 when extending into the first installation opening 12312. When moving along the clamping notch 12313, the first clamping portion 1215 abuts against the second clamping protrusion 1236 on the side close to the rotating shaft 1312 to clamp the clamping end 1212 to the mounting body 123.

[0063] It should be noted that a guiding inclined surface 1216 may be provided on one side of the first clamping portion 1215 close to the clamping end 1212, and the guiding inclined surface 1216 extends to the side where the first clamping portion 1215 abuts against the second clamping convex block 1236. In this way, when the first clamping portion 1215 extends into the first accommodating space 1231 from the first installation opening 12312 and moves along the clamping notch 12313 towards the second clamping convex block 1236, the guiding inclined surface 1216 first abuts against the second clamping convex block 1236 and gradually slides to the side of the second clamping convex block 1236 close to the rotating shaft 1312, so that the first clamping portion 1215 abuts against the side of the second clamping convex block 1236 close to the rotating shaft 1312.

[0064] Please refer to Figure 7 , Figure 7 which is an exploded schematic view of the installation main body 123, the installation cover body 121 and the rotor 131 in another structural form of the motor assembly 10 provided by the embodiment of the present invention.

[0065] It should be noted that the installation cover body 121 is also connected to the installation main body 123 in the following manner. The clamping end 1212 and the installation main body 123 are detachably connected by connecting members such as screws. And a second clamping protrusion 1218 protrudes from one end of the installation cover body 121 away from the clamping end 1212. A clamping opening 12314 may be formed on the edge of the first installation opening 12312. The second clamping protrusion 1218 can be clamped in the clamping opening 12314 to connect one end of the installation cover body 121 away from the clamping end 1212 to the installation main body 123.

[0066] Please refer to Figure 8 , Figure 8 which is an exploded schematic view of the motor assembly 10 provided by the embodiment of the present invention when only the stator teeth 132 are separated.

[0067] A stator connection portion 1237 may protrude from the outer side surface of the installation main body 123. A fixing hole 12371 is formed at one end of the stator connection portion 1237 away from the installation main body 123, and the fixing hole 12371 communicates with the first accommodating space 1231. The stator teeth 132 are inserted into the fixing hole 12371, and the stator coil 133 is wound around the stator connection portion 1237. In this way, the stator teeth 132 can be directly installed after the winding of the stator coil 133 is completed, and the assembly is relatively convenient.

[0068] It should be noted that in this embodiment, the number of the stator teeth 132, the stator coils 133 and the stator connection portions 1237 is two, and the two stator connection portions 1237 are symmetrically arranged on the outer side surface of the installation main body 123.

[0069] Further, the stator tooth 132 may include a tooth portion 1321 and a yoke portion 1322. Wherein, the yoke portion 1322 is arranged in a U shape. The tooth portion 1321 is inserted into the fixing hole 12371, and the tooth portion 1321 is connected to the middle part of the yoke portion 1322. Herein, the middle part refers to the position corresponding to the middle equal part when the corresponding object is divided into three equal parts along its length direction. When the tooth portion 1321 is inserted into the fixing hole 12371, the two end parts of the yoke portion 1322 on one side of the mounting body 123 are respectively connected to the two end parts of the yoke portion 1322 on the other side of the mounting body 123 to increase the torque of the motor assembly 10. The yoke portion 1322 and the tooth portion 1321 may be made of a magnetic conductive material, such as iron, nickel-cobalt and their alloys, etc. In addition, it should be noted that the yoke portion 1322 and the tooth portion 1321 may also be integrally formed.

[0070] It should be noted that a stator fixing portion 1239 may also protrude from the stator connecting portion 1237. The stator fixing portion 1239 is an arc-shaped plate and cooperates with the yoke portion 1322. The fixing hole 12371 penetrates through the stator fixing portion 1239, and there is a gap between the stator fixing portion 1239 and the mounting body 123. The stator coil 133 is located within the above gap, thereby separating the stator coil 133 and the yoke portion 1322.

[0071] Please refer to Figure 5 、 Figure 9 and Figure 10 , Figure 9 which is a schematic structural diagram of the motor assembly 10 provided by the embodiment of the present invention during assembly. Figure 10 is Figure 9 the schematic cross-sectional structural diagram at A-A in

[0072] One end of the mounting body 123 is an output end 12317. An output opening 12315 may be opened on the output end 12317. The mounting bracket 12 may further include a seal 125. The seal 125 is sleeved on the output end 12317, and the seal 125 is also clamped on the output end 12317. The rotating shaft 1312 of the rotor 131 can partially extend out of the first accommodation space 1231 through the output opening 12315 and pass through the seal 125 to be connected to the brush head 20, so as to seal the first accommodation space 1231 and prevent impurities such as water from entering the first accommodation space 1231 through the output opening 12315.

[0073] It should be noted that a plurality of connecting through holes 12316 may be provided on the output end 12317, and the plurality of connecting through holes 12316 extend to the output opening 12315. The material of the output end 12317 is an elastic material such as plastic. A clamping block 1238 may be convexly provided on the outer side surface of the mounting body 123, and the clamping block 1238 is located at the output end 12317. A clamping interface 1252 may be provided on the seal 125. When the seal 125 is sleeved on the output end 12317, the clamping block 1238 is clamped in the clamping interface 1252 to clamp the seal 125 and the output end 12317. Moreover, by providing a plurality of connecting through holes 12316, the diameter of the output end 12317 can elastically deform and become smaller, so that the seal 125 can be clamped on the output end 12317.

[0074] In addition, the seal 125 may include a sealing portion 1251 and a sealing connection portion 1253. The clamping interface 1252 is located at the sealing portion 1251. The sealing connection portion 1253 is sleeved on the output end 12317. The sealing portion 1251 is made of a soft material such as rubber and is sleeved outside the sealing connection portion 1253. At the same time, the sealing portion 1251 is sleeved on the rotating shaft 1312 to seal the first accommodation space 1231.

[0075] The working principle of the motor assembly 10 provided by the embodiment of the present invention is as follows:

[0076] The driving mechanism 13 includes a rotor 131, stator teeth 132 and a stator coil 133. The mounting bracket 12 is used to be connected inside the brush handle 30 of the electric toothbrush 100. Among them, the mounting bracket 12 includes a mounting cover body 121 and a mounting body 123. A first accommodation space 1231 and a first mounting opening 12312 are provided on the mounting body 123, and the first accommodation space 1231 and the first mounting opening 12312 are communicated. The mounting cover body 121 covers the first mounting opening 12312 and jointly clamps the rotor 131 in the first accommodation space 1231 with the mounting body 123. The rotor 131 can rotate relative to the mounting body 123, and the rotor 131 is used to be in transmission connection with the brush head 20 of the electric toothbrush 100. The stator coil 133 is wound around the outer side surface of the mounting body 123. The stator teeth 132 are connected to the mounting body 123, pass through the stator coil 133, and correspond to the rotor 131 to drive the rotor 131 to swing. In this way, by directly installing the rotor 131 and the stator through the mounting body 123, the brackets for separately installing the rotor 131, the stator coil 133 and the stator teeth 132 are omitted, the volume of the motor assembly 10 is reduced, which is convenient for the user to hold the brush handle 30. Moreover, through the mounting method of jointly clamping the rotor 131 by the mounting cover body 121 and the mounting body 123, the assembly of the rotor 131 is more flexible and convenient.

[0077] To sum up:

[0078] An embodiment of the present invention provides a motor assembly 10, which has the characteristic of a relatively small overall volume.

[0079] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the features in the above embodiments can be combined with each other without conflict, and the present invention can also have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention. Moreover, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be encompassed within the present invention. Any reference signs in the claims should not be construed as limiting the claims involved.

Claims

1. A motor assembly, characterized in that, It includes a mounting bracket and a driving mechanism. The driving mechanism includes a rotor, stator teeth and a stator coil; The mounting bracket is used to be connected inside the brush handle of an electric toothbrush. The mounting bracket includes a mounting cover body and a mounting main body. A first accommodating space and a first mounting opening which communicate with each other are provided on the mounting main body. The mounting cover body covers the first mounting opening and jointly clamps the rotor in the first accommodating space with the mounting main body. The rotor can rotate relative to the mounting main body and is used for driving connection with the brush head of the electric toothbrush; The stator coil is wound around the outer side surface of the mounting main body. The stator teeth are connected to the mounting main body, penetrate through the stator coil and correspond to the rotor; One end of the mounting main body is an output end. An output opening and a connection through hole are formed on the output end. One end of the connection through hole extends to the output opening; The mounting bracket further includes a sealing member. The sealing member is sleeved on the output end and is clamped to the output end; A part of the rotor can extend out of the first accommodating space through the output opening and pass through the sealing member to be connected with the brush head.

2. The motor assembly according to claim 1, characterized in that, The mounting main body is strip-shaped. The first mounting opening is located on the side surface of the mounting main body and can allow the rotor to pass through, so that the rotor can be loaded into the first accommodating space from the first mounting opening.

3. The motor assembly according to claim 1, characterized in that, One end of the mounting cover body is a clamping end. The clamping end is clamped with the edge of the first mounting opening, and the other end is detachably connected with the edge of the first mounting opening to detachably cover the first mounting opening.

4. The motor assembly according to claim 3, characterized in that, The clamping end is used to jointly clamp the rotor with the mounting main body. The end surface of the clamping end is a clamping end surface. A first clamping protrusion protrudes on the clamping end surface, and a first clamping part protrudes on the first clamping protrusion; A clamping notch communicating with the first accommodating space is formed on the edge of the first mounting opening. The first clamping protrusion is located in the clamping notch, and the first clamping part is located in the first accommodating space and abuts against the wall surface of the first accommodating space to detachably clamp the clamping end to the mounting main body.

5. The motor assembly according to claim 4, characterized in that, The end surface of the clamping end is a clamping end surface. A clamping interval is left between the first clamping part and the clamping end surface; A first clamping bump protrudes on the wall surface of the first accommodating space. The first clamping bump is located in the clamping interval and abuts against the first clamping part and / or the clamping end surface respectively.

6. The motor assembly according to any one of claims 1-5, characterized in that, A stator connection part protrudes on the outer side surface of the mounting main body. A fixing hole is formed at the end of the stator connection part far away from the mounting main body. The fixing hole communicates with the first accommodating space; The stator coil is wound around the stator connection part. The stator teeth penetrate through the fixing hole.

7. The motor assembly according to claim 6, characterized in that, The number of the stator teeth, the stator coil and the stator connection parts is two. The two stator connection parts are symmetrically arranged on the outer side surface of the mounting main body; The stator teeth include a tooth portion and a yoke portion, the yoke portion is U-shaped, the tooth portion is inserted into the fixing hole and connected to the middle portion of the yoke portion, and the two end portions of the yoke portion on one side of the mounting body are respectively connected to the two end portions of the yoke portion on the other side of the mounting body.

8. The motor assembly according to any one of claims 1-5, characterized in that, The motor assembly also includes a power supply, which is electrically connected to the stator coil; The installation body is also provided with a second accommodating space and a second installation opening which are interconnected. The second installation opening is located on a side of the installation body and can allow the power supply to pass through. The second accommodating space is used to accommodate the power supply.

9. An electric toothbrush, characterized in that, It comprises a brush head, a brush handle and a motor assembly as claimed in any one of claims 1 to 8; The mounting bracket is connected to the brush handle of the electric toothbrush, and the rotor is drivingly connected to the brush head of the electric toothbrush.

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